/*
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 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 */
package controller;

import edu.albany.csi518.sick.DiseaseSymptom;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.Map;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

/**
 *
 * @author Anthony
 */
@WebServlet(name = "RefineDiseases", urlPatterns = {"/RefineDiseases"})
public class RefineDiseases extends HttpServlet {

    /**
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code>
     * methods.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        
        try (PrintWriter out = response.getWriter()) {
            DiseaseSymptom disease_symptom;
            HttpSession session = request.getSession();
            String checkboxVal;

        //Query query = new Query();
            boolean debugger = false;

            disease_symptom = (DiseaseSymptom) session.getAttribute("dis_symp_obj");

            try {

                if (disease_symptom == null) {
                    out.println("<h3> Obj was null</h3>");
                } else {
                    Iterator it = disease_symptom.getIt();
                    out.print("<h2>Result</h2>");
                    if (it.hasNext()) {
                        /* search diseases */

                        /* checkbox form header */
                        while (it.hasNext()) {
                            String key = (String) it.next();    //disease from hashmap key

                            String disease = request.getParameter("disease");
                            checkboxVal = request.getParameter("checked");
                            //checkboxVal = (String) request.getParameter(key);
                            
                            if (checkboxVal == null){
                                checkboxVal = "";
                            }
                            if(disease == null) {
                                disease = "";
                            }
                            if (checkboxVal.compareTo("on") == 0 && disease.equalsIgnoreCase(key)) {
                                out.println("<h3>" + key + "</h3>");
                                
                                ArrayList<String> syms = disease_symptom.getVal(key);

                                /* print symptoms for disease */
                                String sym = "<p>";
                                for (String s : syms) {
                                    sym += "<a href=\"\">" + s + "</a>, ";
                                    //out.println("<p>" + s + "</p>");
                                }
                                sym += "</p>";
                                out.print(sym);
                            }

                        }

                        out.println("</body>");
                        out.println("</html>");
                    }
                }
            } finally {
                out.close();
            }
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP <code>GET</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Handles the HTTP <code>POST</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>

}
